Bar bender



T. KARDONG.

BAR BENDER.

APPLICATION FILED JUNE 25,'1920.

ggg-L Patented Auw, w22,

2 SHEETS-SHEET I- u Y -001000000 III ATTO R N EY T. KAR'DONG.

BAR BENDR.

APPLICATION lLED JUNE 25. 1920.

l ,425,26 l Patented Aug. 8, '1922'.

2 SHEETS-SHEET 2.

. l f l 1f ATTORNEY BENDER.

ineaaei.

spannen@ of Lettersramnt. .Patented Auga, s1922.

v`Application vfilled June25, 1920. Serial No. 391,649.

To all whom t may concern Be it known that l, THnoDoRn lnnnons, a citizen of the TJnited States.` residingA at hilinneapolis, in the county ,ofH-eni'iepin and State of li/liiinesota, have linvented new and useful Bar Benlder', of whichthe following is a specification. 'Y

This inventionhas reference to bar benders, particularly metal bars designedvlfpr reinforced concrete y work althiough not necessarily confined thereto.

One ofthe objects ofthe invention `isto provide a bending machine which maybe set up in a shop or other suitable location whereby metal of y considerable thickness, say rup to 1% in diameter,y may be bent into various shapes by hand to beimbedded in concrete work to strengthen the latter. lnr accordance with the inventionhthere is provided a framework or'b'ench nfl appropriate height and of jaistructure vresistant lto relatively heavy strains,l upon y which there is located a swiveled or pivotedbending head or knuckle `capable of movement to bend the bar right'or left to any angle up to 180 degrees. The bending head is pivoted to turn about anv afgis. These features are valuable in 'that ,the bends are either right or llefttherebysaving reversing the bars. The 'machine is capable of receiving an extension :handle for heavy bars, the extensionA handle being connected to the bending "head Hor knuckle. v

Because of the movement ofthe bending head about an upright v airis it lis possible to place a resistant 'roller' oneither side of Athe bending member 'for right' and left hand bending. The resistant roller carried by a stub and fasockettto ireceive the latter is provided on each side of the bending member, into which socket the stub shaft is placebene socket .being utilized `for bending inl'one direction and the lother for bending in the other direction.

The invention provides a horizontal support or ytrack for the bar to rest*` upon and provision is made for the-,support of a lmeasuring stick in order to locate on the bar the point o f bending. The carriers for the bar rests are utilized Etocrarry ,the Ineasulring stick. y

The inventien .will .be best liedereteed yfrom a consideration of the following de tailed description taken in cpnnectioii with the accompanying drawings forming part of this specication, with the ,understand ing, however, that the'inventionl is 'not rconiined to any strict cpnforinity with Athe showing in the drawings, but ymaybe changed and modiedv'so lpng Ias' such changes and modifications mark no material departure from the salient features of ,the

A invention as expressed in the appended claims.

Fig. l.

Fig. 3 is a vertical axial ysection of the machine shown lin Fig. l'. Fig. l is a bottom plan view of the bending table casting.

Fig. 5 is an elevation of ythe bending head and its supporting spindle.

Fig. 6 is a side elevation of the tableA shown in Fig. 4.

Fig. 7 is a perspective view Aof one of the support-ingy blocks for the gauge strip and the bar rests. l Fig. 8 is a perspective view of one of the terminal blocks oi castings for carryingthe gauge strip and ybar rests. 'y

vReferring to drawings there Ais Ashown a main frame yconiposedfof slegs 11,' top "and bottom connecting bars 2 and cross braces 3 which may be ,made of angle and `strip metal properly riveted and; bolted together, theflegs l Aandbars A2 being lconj'eniently made of angle metal. Y .Uponnthe ,top voftvhe .frame there is located a platform l- Twhich mayy be conveniently ,made of ,wood although not necessarily confined ltov such particular material.

Secured on top of the platform 4 is a casting 5 constituting a table khaving a marginal strengthening rim 6 and radial strengthening flanges 7, of greater depthat the centerof the tablethanat the yrnargins thereof and rising toward and'mergingfat ltheir outer ends into the bottom of'thelt'able.

At the central portion of the tablewthe flanges 7 joina sleeve `8,.and, at appropriate distances fromthe sleeve 8, certainpfwthe flanges are .formed with v:so zketsY v9 may rise abovefthe top of the table. or i strengthening purposes the sockets E), where risingn above the top of the table, arey provided with flanges 10 merging into the upper surface of the table. Bolts-"11 or other suitable fastening devices secure the table to the platform 1.

Adapted to the sleeve 8 is a 'stout fulcru'm Vpin "=12v carrying a bending head 13 from which there projects an arm 14; carrying-a hollow handle extension 15. Provision may be madefor using` handlesl of different llengths or for extendingthe length of the handle 15 for. heavy work, ythe handle 15 serving as the long;` arm of ale-ver of which the head 13 constitutes the short arm, and

provision is also made 'for the application vof a collaripl to the upper end of the pin 12, While a wear or bending plate or shoe 17 applied to the arm 14e, which fat its junction with the head 13, is laterallybroadened, constitutes a bearing member for holding a bar or rod A18,(to be bent, in engagement with the collar 16 during the bending operation. v There is also provided a pin 19 adapted to either socket 9 andof -a length to rise above the upper end of the sockeuthere .receiving v a roller 2O and constituting a resistance roller holding the bar 18 from following the `movement of the bendinffhead, while the latter is being actuated to bend the barabout the collar 16. f

On diametricallyI opposite sides ofthe platform there are secured. blocks 21, one of which is shown separately in F 8. l,Each

block is provided with perf'orati/ons 22 for the passage of securing means whereby the block is fastened to the platform t and each block, which is shown f as ofollonpj shape,

,Y has anl entering socket 23 at oiieend, and a short post 2 4 kabout midway of its length. Each post 24 has a perforation 25 therethrough forthe passage of a bolt 2G, or other i, suitable means for securingv a corresponding` end cf'bar rest 27, ata suitable height to support ,the bar 18 at the end remote 'from that beingbent.A The bar rest 27 `is indicated in ythe form of a substantially` semi-circular, ifiat strip set on edge. Outside of and substantially concentrio'with the bar rest is similarly curved gauge strip tast at theends tothe blocks 21. At intermediate points in the length ofthe bar rest 2T andnaurre 28 vare other supprlirtingw blocks each with an end post 30 formed thereon. The blocks 29 underride the gauge 28 with the bar' rest 27 .t against the posts to which theyl are se# curedby :bolts 81er in other suitable manner, ,the` frange 28 beine supported by and G0u krmadejfast,tothe bloclrsQQ or ,in any lappro- '.,priate way.,` The gauge 23 is provided with, Ia seriesofpertora'tions any one of which.

` is adalit'e'djto receive a stop, piu 1 rlength'fas. toK ,be in ,the path the the. 1

'65 I gageablewith' eitherof said sockets, adaptof such bar 18 when bent."

1, the lrod v18 isheld againstlthe roller 20 while thev shoe 17 causes the bending ofthe corresponding portion ofthe rod7'18 about the collar v16,the bending continuing until,

.the pin `33 is reached, the location of the pin 33 determining vthe angleof the completed vbend and the length of the bent end of the arm being determined yby theloriginal location, of the rod-as determinedby the meas# uring rod or scale 34. l ,v ,Y

For bending the rod inv the opposite direction it isonly necessary'to shift the roller 20 to theother pin 19 f'or two pin-s 19 and two measuring sticks 311, on opposite sides,

of the machine, aremade a part ofthe permanent-equipment. On swinging `the head 13 in the opposite, directionfrom, that first `considered the opposite bend is produced.

In this case the rod 18 bears ,against-thee.

roller-20 initschanged .positionfand the shoe 17 `bears appropriately, upon tlie'rod causing the bend"` to occui as desired'. ln such case .the pin Bisshifted to anotherzperforation 32 rin accordance 'with tliefchanged condi- The machine is th-.ere'fore` adaptedvto the performance of vbendings in different direc-. tionsfwith, a minimum of change yand consequently' witli'expeditionr y.Such arrangement :is advantageous as atinie' Vand laborsaver,l especially "where largefnumbers of bars are to be bent,. L

lllhat' is claimed is:

`Ina bending machine, a table,l`a bend-l v y,ing head* rotatablymounted on the ytable,

comprisingl a vertical fulcrum ypin and a bendingV shoe spaced,from the pin adapted c to engagel and bend rodsinserted in 'the yspace between the pin and shoe, 'a pair of vertical sockets in the tablel on opposite sides of -said bending h'eadandy a roller having' a pin insertable in either of said sockets and adapted to `form an 'abutment' for bending `rods in eithena clockwise or counterclockwise direction. y, y p

'12. .In a bending machine, plate, a fulcrum; pinliavingj a flat-facedshoe spaced apart land',"rotatableon the plate and'adapted"friolreceivel rodsfinserted therebetween, spyacodiupstanding sockets integral with `the `plate'arrtingedy onv oppositey 'sides of ,said

Shand an abutment roller selectively ened to holdrods against movement for bendclockwise direction. y

3. In a rod bender, a bed plate, a bending head rotatably mounted in the center of the plate, said bead comprising a vertical 'fulcrum pin having a collar, and a bending shoe firmly connected to the pin and spaced rom the collar to receive the rod to be bent between the collar and shoe, a pair of upstanding roller receiving sockets on opposite sides of, and in alignment With, the idle position or' the bending shoe, and a roller adapted Jfor selectively engaging either ot' the sockets and to cooperate with the bending head to torni either right or left hand bends at will.

Ll. In a bending machine, an oblong table, an oscillatable bending head on the table comprising a central vertical pin, and a shoe rotatable with and spaced from the pin, a measuring device adapted to be secured to either of tivo opposite sides of the table and extending radially from the axis of the bending; head, a pair ot sockets on opposite sides of the idle position of the bending shoe, and a roller adapted to be mounted in either ot said sockets.

In a bending machine, a table, bending i means rotatably mounted in the center of said table, a pair ot blocks on opposite sides ot the table having sockets extending radially ltrom the axis of rotation of said head. a measuring device adapted to be removably mounted in either of the sockets, a bar rest secured to each of said blocks, and a roller removably mounted on the table and adapted to hold rods during the bending operation.

6. In a rod bender. a table, a rotatable bending head mounted on the table means tor manually operating the head, an abutment roller removably mounted on the table, a pair of blocks secured to the table on diametrically opposite sides of the axis of the bending head, a semi-circular bar rest, and an arcuate gage each secured to said blocks and to the table, each of the blocks having a socket adapted to receive a rod measuring stick.

7. In a bending machine, a table, a bed plate on the table, bending means rotatably mounted on the plate, an abutment roller adapted to be rotatably mounted on the plate on opposite sides of the bending means, a pair of blocks securedA to the table on diametrically opposite sides of the axis of the bending means, anearcuate bar rest, and av semi-circular perforated gage both arranged concentrically with the axis of the bending means and secured to said blocks,

and stop means insertable in the perforations of said gage bar to determine the angle of the bends to be made.

8. In a bending machine, a table, a bed plate mounted on the table, a bending head rotatably mounted in a socket in said plate, j

a pair of roller receiving sockets integral with the plate on opoiste sides of the bending head, a rod measuring gage removably mounted on the table and adapted to be selectively secured on diametrically oposite sides of the axis of the bending head, and a bar rest secured to the top of the table.

9. In a bending machine, a support, bending means thereon, blocks at diametrically opposite points on the support, each block having a socket, said socket being adapted to receive a measuring means, and a bar Y rest and gauge connected at their ends to said blocks. j i

l0. In a bendingmachine, a frame, a platform thereon, bending means on said plattorm, a bar rest arranged concentric with the axis ot' said bending means, and blocks for supporting the ends of said bar rest, said blocks each having a socket for the reception of a measuring means which extends outwardly in a radial direction.

11. AV bar bending machine comprising a suitable iframe, ata-ble mounted o'n the frame provided with an upright pivot and rising therefrom, a bar bending head mounted on the pivot in juxtaposition thereto, a resistance member associated with the head and having seats on the table on opposite sides of the pivot pin, a bar` rest substantially concentric with the pivot pin, a gauge also substantially concentric With the pivot pin, and blocks adjacent to the table Jfor supporting the bar rest and the gauge.

12, A bar bending machine comprising a suitable frame, a table mounted on the frame and provided With an upright pivot and rising therefrom, a bar bending head mounted on the pivot in juxtaposition thereto, a resistance member associated With the head and having seats on the table on opposite sides of the pivot pin, a bar rest substantially concentric to the pivot pin, a

gauge also substantially concentric With the pivot pin, and blocks adjacent to the table for supporting the bar rest andthe gauge, the bar rest comprising a strip set on edge and the gauge being provided With a series of perforations to receive a stop pin for predetermining the extent of bending of the bar.

In testimony, that I claim the foregoing as my own, I have hereto aiiixed my signature.

THEODORE KARDONG. 

